OEM / REF: 6B5.9SKU: pilotpart904019-8609360412920
Exhaust Manifold 3901919 for Cummins Engine 4B3.9 6B5.9 6C8.3 B4.5 ISB ISBE QSB3.9 QSB4.5 is a Manifold replacement part for Cummins Engine Spare Parts, categorized under Engine Spare Parts > Manifold. Use OEM part number 6B5.9 and confirm machine model, engine model, and serial details before checkout.
Cummins Manifold buyers can use 6B5.9 to cross-check shape, connector style, and mounting position against the component being replaced.
Additional cross references on file: 6C8.3, B4.5, 3901919. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.
Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.
Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.
Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.
